I have to travel for my work - that's just the way it is. But I try to keep this to a minimum by doing only really important assignments and by doing something good for the environment in return.

Do you know your carbon footprint?

No. It's impossible to calculate. But I do try to offset my carbon emissions. I hardly use any electricity, which suits my old-fashioned lifestyle very well, and I take showers that are almost cold.

What is your most regular green habit?

Walking almost anywhere, recycling everything I can and eating organic food, plus half my wardrobe is second-hand and vintage clothing and 90% of my furniture is antique, as is everything in my shop in New York.

What was the last green thing you did?

I learned to wash my clothes at 30 degrees instead of the usual 40 degrees or 60 degrees. It's so simple and you can save 40% of the energy by doing this. That was a very cool and simple discovery to make.

What green gadget would you buy?

I would love to fit solar panels on to my wooden cottage in upstate New York. It's a real suntrap there and I like the idea of harnessing the sun's rays to create energy for my home.

What wakes you up in a sweat in the middle of the night?

What doesn't wake me up in the middle of the night would be an easier way to put it! Some crazy lunatic having a bad day and finally pushing that damn button somewhere, giant meteors hitting the earth, a deadly virus spreading worldwide, earthquakes, tsunamis, the future for my child in this world.